Correct Answer: A. All traffic from a source IP to a destination IP is sent to the same interface.
Explanation of each option:
A. Correct: Default behavior is source-destination IP-based hashing for consistency.
B. Incorrect: Latency-based routing requires a matching SD-WAN rule.
C. Incorrect: Session-based distribution is not default behavior.
D. Incorrect: Routing considers both source and destination IPs, not just source IP.
if no sdwan rules are matched, traffic is routed by the implicit rule, which in this case, says that traffic is routed by source - destination, it does mean that all traffic from the same source and destination IP's is routed by the same initial interface
https://docs.fortinet.com/document/fortigate/7.4.4/administration-guide/216765/implicit-rule
Traffic is divided equally between the interfaces. Sessions that start at the same source IP address and go to the same destination IP address use the same path.
Guys, it's easy..."is douesn't match any of the sdwan rules... will match the implicit rule and the algorithm is source-destination ip, so the answer in A
If you log into a firewall, you'll see the following options:
"Source IP" is the default setting.
Source IP:
Traffic is divided equally between members. Sessions that start at the same source address use the same route.
Sessions:
The traffic is distributed based on the number of sessions that are connected through the member.
Spillover:
The highest priority member is used until bandwidth exceeds ingress and egress thresholds. Additional traffic is sent through the next SD-WAN member.
Source-Destination IP:
Traffic is divided equally. Sessions that start at the same source IP address and go to the same destination IP address use the same route.
Volume:
The workload is distributed based on the number of packets that are going through the member.
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